How are we expecting these new forms of Solgaleo and Lunala to affect them? Stat changes? Ability changes? Movepool changes?
Movepool change is the least likely, at most, they'll just get Necrozma's signature move. But I can see stat change happening, and perhaps ability change as well.
One thing I really think will happen though, is that the Necroleo/Necronala transformation will work like B-Kyu/W-Kyu, in that we can only have one at a time, not both.